EP2891752A1 - Corps de formage en matière légère et son procédé de fabrication et d'utilisation - Google Patents

Corps de formage en matière légère et son procédé de fabrication et d'utilisation Download PDF

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Publication number
EP2891752A1
EP2891752A1 EP14198871.7A EP14198871A EP2891752A1 EP 2891752 A1 EP2891752 A1 EP 2891752A1 EP 14198871 A EP14198871 A EP 14198871A EP 2891752 A1 EP2891752 A1 EP 2891752A1
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EP
European Patent Office
Prior art keywords
shaped body
aggregate
binder
cement
mpa
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14198871.7A
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German (de)
English (en)
Inventor
Barbara Steiner-Enk
Christof Karlstetter
Roman Wack
Horst Drotleff
Klaus Seldbauer
Klaus Breuer
Seyed Zolanvari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Filing date
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Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP2891752A1 publication Critical patent/EP2891752A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52—Sound-insulating materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742—Use of special materials; Materials having special structures or shape

Definitions

  • the invention relates to a molded body made of a lightweight material and a method for its production, wherein the shaped body contains at least one aggregate and a binder. Shaped bodies of the type mentioned can be used as sound or as heat insulation.
  • these known lightweight components have the disadvantage that in case of fire poisonous vapors may arise from the epoxy resin. Under high thermal load, the resin can melt and drip from the ceiling when used as a ceiling covering, so that there is a risk of burns for people escaping from the building. Furthermore, in the production of the known lightweight components, solvents can remain in the plates, which are released into the room air and have a harmful effect there.
  • the hardeners used for the production of epoxy-bound elements may contain bisphenols or amines, which may also be released into the room air and there toxic to organisms in the room.
  • the invention is therefore an object of the invention to provide a molded body made of a lightweight material and a method for its production, which is incombustible and releases no toxic substances in the room air.
  • the molding should meet the requirements of a sound absorber and the usual meet building physics requirements for compressive and tensile strengths, water and acid resistance
  • the object is achieved by a molding according to claim 1, a method according to claim 12 and a use according to claim 15.
  • a shaped body which contains at least one aggregate and a binder.
  • the at least one aggregate ensures the required compressive strength of the lightweight material, wherein the binder mediates the bond between the individual grains of the aggregate and thereby provides the base tensile strength.
  • the tensile strength can be enhanced by an additional introduced or applied reinforcement.
  • the aggregate may contain granules of predeterminable particle size or with a predefinable particle size distribution.
  • the granules may contain an inorganic solid.
  • the individual granules of the granules may themselves be porous, i. have a Korneigenpormaschine.
  • the binder contains or consists of a hydraulically setting cement.
  • different cements may be used, for example blastfurnace cement, Portland cement or trass cement. Occasionally, a mixture of different cements can be used. This avoids the use of organic toxic substances. Since cement-based building materials are widely used, for example as interior plaster, as a concrete component or as a mortar, the proposed molding can be easily integrated into existing structures, either as a supporting or as a non-supporting element.
  • the binder and / or the shaped body can also contain additives and / or additives in some embodiments of the invention.
  • Additives may be liquid, powdery or granular substances which are added to the binder in the preparation, by chemical and / or physical action properties of the binder - such. B. processability, solidification, hardening or frost resistance - to change.
  • at least one additive may be selected from a foaming agent, a pore former, a retarder, a flow improver and / or an accelerator.
  • the preparation of the proposed molding can be carried out in a simple manner by dry mixing the at least one aggregate and at least one cement in a predeterminable mixing ratio. Thereafter, a predetermined amount of water may be added to this dry mixture. Finally, the resulting mixture can be filled in at least one mold, whereupon the cement hardens hydraulically.
  • the binder system of the molding according to the invention thus contains at least the binder and water. After the preparation of the molded article, it contains at least the hydration products of the cement and additives.
  • the shaped body may take the form of a hollow block, a solid stone or the shape of a plate.
  • the shaped body according to the invention may have a reduced heat transfer value or improved sound absorption compared with other building materials.
  • the proposed molded article can be used as a sound absorber in the interiors of buildings, vehicles, ships or aircraft to reduce sound levels or reverberation times in at least some frequency bands. As a result, the well-being of persons who are in this interior can be improved.
  • the sound absorption coefficient ⁇ is about 0.1 to about 0.7. In other embodiments of the invention, the sound absorption coefficient is ⁇ is about 0.3 to about 0.6. In still other embodiments of the invention, the sound absorption coefficient ⁇ is about 0.2 to about 0.4. In further embodiments of the invention, the sound absorption coefficient ⁇ is about 0.1 to about 0.5 or the sound absorption coefficient ⁇ is about 0.1 to about 0.8. In some embodiments of the invention, the sound absorption coefficient ⁇ is less than about 0.8. For the purposes of the present specification, the sound absorption coefficient is a value determined according to ISO 10534-2: 1998.
  • the sound absorption coefficient may in some embodiments of the invention depend on the frequency of the radiated sound wave.
  • the specified sound absorption factor of about 0.1 to about 0.7 is thus achieved at least at a predetermined frequency or in a frequency band of predeterminable width.
  • the frequency or frequency band may be selected from the range of 500 Hz to 1.5 kHz in some embodiments of the invention.
  • the aggregate may contain an open-pored inorganic solid.
  • An open-pored aggregate can lead to the resulting molded body having a heap porosity, a grain intrinsic porosity or a combined porosity and heap porosity.
  • the aggregate may have a grain size of about 0.1 mm to about 20.0 mm or about 0.1 mm to about 8 mm. In some embodiments of the invention, the aggregate may have a grain size of about 0.1 mm to about 4 mm, or about 0.5 to about 2.5 mm. In other embodiments of the invention, the aggregate may have a grain size of from about 1 mm to about 2 mm.
  • An aggregate grain in said grain size range leads to a shaped body with a specific flow resistance, which on the one hand allows the penetration of a sound wave in the molding, so that the sound is not largely reflected and on the other hand does not cause the sound penetrates the molding almost unrestrained and at one behind the surface is reflected.
  • the grain size proposed according to the invention can be determined, for example, by dry screening or wet screening according to DIN 18123-4.
  • the aggregate may contain or consist of expanded glass and / or perlite and / or pumice and / or foam lava and / or expanded slate and / or mineral foam and / or expanded clay and / or foamed silicates and / or diatomaceous earth.
  • Such an aggregate is open-pored or has a grain porosity, i. on the surface of individual grains there are open pores which extend into the interior of the grain. This allows a sound wave to penetrate and be absorbed, i. be converted into heat.
  • these aggregates can be combined particularly well with hydraulically setting cement to a pressure and tensile stable molding.
  • the surface of the aggregate may be covered with binder at about 1% to about 90%. In some embodiments of the invention, the surface of the aggregate may be covered by about 10% to about 50% binder. In some embodiments, the In the invention, the surface of the aggregate may be covered by about 15% to about 30% binder. On the one hand, this results in a sufficient strength of the shaped body and, on the other hand, the grain porosity of the aggregate remains acoustically effective.
  • the molding may have an additional reinforcement. This can improve the tensile strength of the molding.
  • the reinforcement may include plastic fibers, glass fibers, carbon fibers, aramid fibers, or steel.
  • the reinforcement can be inserted into the mold during the manufacturing process or, after the hydraulic setting of the cement, can be adhesively bonded over the whole area to the molded body on at least one side.
  • at least two shaped bodies with or without incorporated reinforcement can also be glued to a reinforcing layer.
  • the reinforcement may in some embodiments of the invention be introduced into the molded body as a scrim or as a braid.
  • the mixture of aggregate, cement and water may be shaken into the mold and / or axially or isostatically pressed in the mold.
  • the degree of filling of the mold and thus the porosity of the resulting molding can be influenced within wide limits.
  • the material may be compacted. This densification can improve the material strengths and / or influence the sound absorption properties.
  • the squeezing pressure may be between about 0.15 MPa and about 0.3 MPa.
  • Such a pressing pressure leads to a material which is homogeneous on the macroscopic level and does not have voids or imperfections, but which has the necessary porosity for sound absorption.
  • the proposed molded article may have a density of about 100 kg / m 3 to about 800 kg / m 3 . In some embodiments of the invention, the proposed molded article may have a density of from about 150 kg / m 3 to about 700 kg / m 3, or from about 350 kg / m 3 to about 500 kg / m 3 . Due to the low density is a simple transport and ease of processing of the molding at the place of last use and a universal use in moving rooms possible, such as in vehicles or elevator cabins. Furthermore, a shaped body in the said density range has a porosity which advantageously permits the use of the shaped body for sound and / or heat insulation.
  • the compressive strength of the molded article is about 0.1 MPa to about 5 MPa, more preferably about 0.2 MPa to about 3 MPa. These compressive strengths are determined according to DIN 196-1. The stated compressive strengths allow the use of the molding as a load-bearing element in buildings, so that an additional concrete or brick wall can be omitted. In this case, since the load-bearing building envelope and the sound and heat protection are realized in a single element, the manufacturing cost of the building can be reduced.
  • the level of aggregate is from about 30 to about 80 weight percent and the level of binder is from about 70 to about 20 weight percent.
  • the amount of aggregate (10) is from about 50 to about 80 weight percent and the proportion of the binder system is from about 50 to about 20 weight percent.
  • the proportion of the aggregate (10) is about 70 to about 90 wt .-% and the proportion of the binder system about 30 to about 10 wt .-%.
  • the water / cement ratio may be from about 0.3 to about 1.5 or about 0.35 to about 0.45. In some embodiments of the invention, the water / cement ratio may be about 0.8 to about 1.1. On the one hand, this leads to the fullest possible hardening of the cement and, on the other hand, to a low water content of the shaped body, so that an additional drying step can be dispensed with since the supplied water was completely reacted with the cement. This results after the hydraulic setting of the cement immediately a molded body, which can be further processed immediately.
  • FIG. 1 shows schematically a cross section through a molded body 1.
  • the molded body 1 contains at least one aggregate 10.
  • the aggregate may contain an open-pored, inorganic solid and have a particle size of about 0.1 mm to about 4 mm.
  • aggregates may be used different grain size are mixed in predetermined mixing ratio with each other to adjust the strength and / or porosity of the molded body 1 to predetermined target values.
  • the aggregate 10 is provided with a binder 20 which connects the individual grains of aggregate with each other, so that the molded body 1 is formed as a tensile and pressure-resistant body with intervening cavities.
  • the aggregate 10 itself either no porosity or the pores of the aggregate 10 are filled by the cementitious binder. This creates between the aggregate 10 pores 30 in the heap of the molded body 1.
  • the in FIG. 1 The structure shown is therefore called Haufwerkspormaschine.
  • FIG. 2 shows a cross section through a molded body 1 according to a second embodiment of the invention.
  • an open-pored inorganic solid is used as the aggregate 10.
  • the aggregate according to FIG. 2 can have different particle sizes, so that a stable packing of the aggregate 10 in the molded body 1 results.
  • the cementitious binder 20 completely or almost completely fills the space between the aggregate so that no open pores are formed there. However, the pores of the aggregate 10, such as expanded glass, are retained. In the FIG. 2 The structure shown is therefore referred to as Korneigenpormaschine.
  • a shaped body which has a Korneigen- and Haufwerkspormaschine.
  • the binder 20 does not completely penetrate into the pores of the aggregate 10, but instead Only deposits on the outside. As a result, the grain porosity of the aggregate 10 is maintained.
  • the binder does not completely fill the interspaces between the grains of the aggregate, so that cavities 30 can arise in the interior of the molded body 1.
  • FIG. 1 explained heap expertise given.
  • the binder leads at the points of contact of adjacent grains of aggregate 10 to an adhesive bond, so that the molded body 1 according to FIG. 3 can absorb compressive and tensile stresses within certain limits.
  • the structure of the shaped body can be adjusted, for example, by selecting the amount of binder, by the mixing time of binder and aggregate, by the molding pressure in the mold and / or the grain size of the aggregate 10, so that the porosity and / or density of the molded article as possible can be adapted to the particular application.
  • FIG. 4 shows a flowchart of the method according to the invention.
  • a dry mix is produced by mixing at least one aggregate and at least one cement.
  • the dry mix can be mixed with a plowshare mixer, for example.
  • the mixing time in some embodiments of the invention may be from about 1 minute to about 6 minutes, more preferably from about 1.5 minutes to about 4.5 minutes.
  • the dry mixture obtained in method step 51 is added to water.
  • the water / cement ratio may be about 0.8 to about 1.1.
  • the mixing in of the water in method step 52 can also be carried out with a ploughshare mixer. The required amount of water may be added over a period of about 15 seconds to about 5 minutes.
  • the mixing time in method step 52 can about 3 minutes to about 15 minutes to allow a homogeneous mixing of all ingredients.
  • At least one additive or compound may be added together with the water or thereafter, for example a foaming agent, a pore former, a retarder, a flow improver and / or an accelerator.
  • the mixture obtained in method step 52 is filled into a mold.
  • the proposed molding can take the form of a solid stone, a hollow block or a lightweight board.
  • a reinforcement can be inserted, which may for example consist of glass fibers, steel, cotton fibers, carbon fibers and / or other materials known per se.
  • the filling of the mold in step 53 may be facilitated by shaking the mixture into the mold and / or axially or isostatically pressing it in the mold.
  • the pressing pressure may be between about 0.15 MPa and about 0.3 MPa. The choice of the pressing pressure can influence the structure of the resulting molding or its porosity.
  • step 54 the cement cures hydraulically, increasing the strength of the molded article.
  • the molded article is left in the mold or made without a mold for a predetermined period of time until initial strength is reached, e.g. in an extrusion process, or only for a short time, e.g. earth-moist paving stone concretes.
  • the shaped body is formed in method step 55.
  • the molded body obtained in process step 55 can be ready for use immediately.
  • the molded body until the required strength for molding, so that the molding after forming in step 55 still has to be stored until the hydraulically curing binder has reached the greatest possible strength and / or the molding is completely dried. This may be the case in some embodiments of the invention after 28 days.
  • an open-pore, expanded glass granules of particle size 2-4 mm, and 1080 g of an open-pored, expanded glass granules of grain size 0.5-1 mm are used as aggregate.
  • the total bulk volume of the aggregate used is 5000 ml.
  • the particle size was determined in each case according to DIN 18123-4 by dry sieving.
  • 562.5 g of a cement is added.
  • the open-pore, expanded glass granulate consists of recycled waste gas with a closed lattice structure.
  • carbon dioxide is blown into the liquid melt or the mixture is mixed with carbon dust, which is subsequently oxidized to CO 2 . This results in small bubbles in the melt, which cause after cooling a Korneigenporostician the aggregate.
  • the two aggregates of different grain size and the cement are dry-blended in a ploughshare mixer for 90 seconds.
  • the duration determines significantly the distribution of the cement and, as a result, in addition to the amount of cement, the porosity of the resulting molding.
  • the resulting mixture is filled into molds and compacted into a 39 mm thick plate.
  • the resulting shaped body After the hydraulic setting of the cement and drying in air, wherein excess water can escape, the resulting shaped body has a haufwerksporiges structure with a bulk density of about 387 kg / m 3 .
  • the compressive strength of Shaped body after 28 days curing time is about 1.8 MPa.
  • the compressive strength is determined according to DIN 196-1.
  • the sound absorption coefficient ⁇ for a single-layer structure is about 0.3 at 500 Hz, about 0.6 at 1000 Hz and about 0.4 at 1500 Hz.
  • the measurement was made at all frequencies at normal sound incidence according to ISO 10534-2: 1998.
  • the resulting shaped body is suitable as a sound absorber, which can positively influence the sound reflection and the reverberation time in a room.
  • the shaped body is incombustible and can also be used as sole wall material due to its high compressive strength.
  • the mixture is mixed for another 5 minutes before the mixture is filled into molds and compacted to a thickness of 32 mm.
  • this shaped body After hydraulic hardening of the cement and drying in air, this shaped body also has a porous structure with a bulk density of about 480 kg / m 3 .
  • the sound absorption coefficient ⁇ according to ISO 10534-2: 1998 for a single-layer structure at 500 Hz is about 0.2.
  • the sound absorption coefficient at 1000 Hz is about 0.4 and the sound absorption coefficient at 1500 Hz is also about 0.4.
  • the 28 days compressive strength of the resulting molded article is 1.7 MPa.
  • 1290 g of an open-pored, expanded clay granules of grain size 2 to 4 mm are mixed dry with a loose bulk volume of 2700 ml with 204 g of a white cement in a ploughshare mixer. Also, this dry mixture is added after 60 seconds 174 g of water over a period of 30 seconds.
  • the resulting mixture is filled into molds and compacted to a thickness of 29 mm.
  • the resulting shaped body After hydraulic hardening of the cement and drying in air, the resulting shaped body has a structure with a high grain mass.
  • the bulk density is about 553 kg / m 3 .
  • the sound absorption coefficient ⁇ at 500 Hz is about 0.7, at 1000 Hz about 0.1 and at 1500 Hz about 0.3 according to ISO 10534-2: 1998 for a single-layer structure. These values were also measured at normal sound incidence, with an air layer of 5 cm between the molded body and the sensor was present.
  • the 28 days compressive strength is about 0.6 MPa.
  • 608 g of an open-pore, expanded clay granules of grain size 0.1 to 0.5 mm are mixed dry with 180 g of a cement in a ploughshare mixer. 180 g of water are added to this dry mixture over a period of 20 seconds after 60 seconds.
  • the resulting mixture is filled into molds and compacted to a thickness of 43 mm.
  • the resulting molded body After hydraulic hardening of the cement and drying in air, the resulting molded body has a hovwerksporiges microstructure on.
  • the bulk density is about 505 kg / m 3 .
  • the 28 days compressive strength is about 1.9 MPa.
  • the sound absorption coefficient ⁇ according to ISO 10534-2: 1998 is about 0.3 at 500 Hz, about 0.3 at 1000 Hz and about 0.4 at 1500 Hz.
  • 219 g of an open-pore, expanded clay granules of grain size 2 to 4 mm are mixed dry with 82 g of a cement in a ploughshare mixer. 82 g of water are added to this dry mixture after 60 seconds over a period of 20 seconds.
  • the resulting mixture is filled into molds and compacted to a thickness of 25.5 mm.
  • the resulting shaped body After hydraulic hardening of the cement and drying in air, the resulting shaped body has a structure with a high grain mass.
  • the bulk density is about 329 kg / m 3 .
  • the 28 days compressive strength is about 1.04 MPa.
  • the sound absorption coefficient ⁇ according to ISO 10534-2: 1998 at 500 Hz is about 0.1, at 1000 Hz about 0.2 and at 1500 Hz about 0.5.
  • the inventively proposed moldings consist exclusively of inorganic binders and aggregates, so that they are flame retardant and fall into a better fire protection class than previously known absorber, which are bonded with epoxy resin.
  • the molding according to the invention can easily made from inexpensive and readily available raw materials. As a result, a large-scale installation, for example in production halls, concert halls or theaters is possible.
  • a smooth surface of the molding By choosing the particle size of the aggregate can be provided in some embodiments of the invention, a smooth surface of the molding, so that a subsequent visual enhancement by fabric covering or plastering is dispensable, so that the installation in a building can be done quickly and easily. Since the proposed molding consists of a concrete-like building material, this can be easily combined with other components, which are made either as precast concrete or in-situ concrete.
EP14198871.7A 2013-12-20 2014-12-18 Corps de formage en matière légère et son procédé de fabrication et d'utilisation Withdrawn EP2891752A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017032412A1 (fr) * 2015-08-26 2017-03-02 Siraso Ab Béton léger et procédé de fabrication
EP3401291A1 (fr) * 2017-05-10 2018-11-14 Mohammed Khan Élément de construction en béton
EP3404001A1 (fr) * 2017-05-19 2018-11-21 A.Tschümperlin AG Béton frais à consistance de terre humide et éléments en béton frais à consistance de terre humide durci

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EP0290881A2 (fr) 1987-05-09 1988-11-17 Sto Aktiengesellschaft Procédé pour préparer des éléments de construction légers
DE3813875A1 (de) * 1987-05-18 1988-12-15 Wienerberger Baustoffind Ag Bauelement fuer eine schallschutzwand oder beschichtung fuer eine solche
EP1413688A1 (fr) * 2002-09-11 2004-04-28 Wilhelmi Werke Aktiengesellschaft Elément resistant au feu, réglant l'humidité et insonorisant et méthode pour sa fabrication

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Publication number Priority date Publication date Assignee Title
DE1961043A1 (de) * 1969-12-05 1971-06-24 Bosch Gmbh Robert Leichtbeton geringer Rohdichte,Verfahren zu seiner Herstellung und Bauelement aus Beton
EP0290881A2 (fr) 1987-05-09 1988-11-17 Sto Aktiengesellschaft Procédé pour préparer des éléments de construction légers
DE3813875A1 (de) * 1987-05-18 1988-12-15 Wienerberger Baustoffind Ag Bauelement fuer eine schallschutzwand oder beschichtung fuer eine solche
EP1413688A1 (fr) * 2002-09-11 2004-04-28 Wilhelmi Werke Aktiengesellschaft Elément resistant au feu, réglant l'humidité et insonorisant et méthode pour sa fabrication

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Title
"Akustik - Bestimmung des Schallabsorptionsgrades und der Impedanz in Impedanzrohren - Teil 2 - Verfahren mit Übertragungsfunktion", DEUTSCHE NORMEN. DIN NORM,, no. 10534-2:, 1 October 2001 (2001-10-01), pages 540 - 567, XP002556312 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017032412A1 (fr) * 2015-08-26 2017-03-02 Siraso Ab Béton léger et procédé de fabrication
EP3401291A1 (fr) * 2017-05-10 2018-11-14 Mohammed Khan Élément de construction en béton
EP3404001A1 (fr) * 2017-05-19 2018-11-21 A.Tschümperlin AG Béton frais à consistance de terre humide et éléments en béton frais à consistance de terre humide durci

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